[YoussefHammad]

if thats really the code then

Код:

public OnPlayerUpdate(playerid) 
{ 
    // Ban players if they have a jetpack 
    if(GetPlayerSpecialAction(playerid) == SPECIAL_ACTION_USEJETPACK) 
    { 
        if(IsOnduty{playerid} == 0)
        {
            Ban(playerid); 
        }
    } 
    return 1; 
}

should work just fine , still reply if it doesnt work